I searched for my problem here and found this thread. I figured I would add to is as I am having the same issues. Plunge ball and center roll over causes Tilt. Further investigation finds that L & R top targets and spinner lane switches cause the same issue. Once points are scored this issue doesn't happen.

I found that if I close switch A on the advance relay (before any points are scored the machine will tilt)

I believe this is because it is advancing the bonus before any points are scored. I looked at Post 10 and to answer Rolf's questions I was finding CCC: Ball-Index-Relay pulls-in and keeps-on pulling. On a new ball I trigger pendulum tilt and get DDD: Ball-Index-Relay pulls-in and stays pulling.

If I insulate switch F on the ball-index-relay the tilting does not happen.

I have been staring at these schematics for a while and the switches in the machine seem Ok. Any one know where else to look? Also what is the point of switch F on the ball-index relay? Why would connecting the spinner lane rollover switch to the tilt be necessary?

Thanks Rolf,

It is weird that the center lane (and other targets [ L & R top targets and spinner lane switch]) now cause the tilt. This happened suddenly, so I am wondering what changed. If I can't find this soon I may just insulate that switch.

I edited this post to remove words that were confusing.